//
//  UIDevice(IdentifierAddition).m
//
//  Created by chenliang
//

#import "UIDevice+IdentifierAddition.h"
#import "NSString+MD5.h"
#import "EnvConfig.h"

#define DEVICE_TOKEN_PASS @"coooliang"


static NSString *udidCache = @"";

@implementation UIDevice (IdentifierAddition)

#pragma mark - uniqueDeviceIdentifier
- (NSString *)uniqueDeviceIdentifier{
    if(![@""isEqualToString:udidCache]){
        return udidCache;
    }
    NSString *udid = @"";
    @try {
        udid = safeString([self getUUID]);
    }
    @catch (NSException *exception) {
        NSLog(@"uniqueDeviceIdentifier exception = %@",exception);
    }
    
    udidCache = udid;
    return udidCache;
}




-(NSString *)getIdentifierForVendor{
    NSString *identifierForVendor =[[[UIDevice currentDevice]identifierForVendor]UUIDString];
    NSString *stringToHash = [NSString stringWithFormat:@"%@%@",identifierForVendor,DEVICE_TOKEN_PASS];
    return [NSString md5:stringToHash];
}

#pragma mark - key chain
-(NSString *)getUUID{
    NSString * const KEY_GESTURELOCKERPLUGIN_TOKEN_VALUE = @"com.pdsm.main.push.token.key";
    NSString * const KEY_GESTURELOCKERPLUGIN_TOKEN_DICTIONARY_VALUE = @"com.pdsm.main.push.token.key.dictionary.key";
    
    NSMutableDictionary *readUserPwd = (NSMutableDictionary *)[self load:KEY_GESTURELOCKERPLUGIN_TOKEN_VALUE];
    
    if(readUserPwd == nil || [@""isEqualToString:safeString([readUserPwd objectForKey:KEY_GESTURELOCKERPLUGIN_TOKEN_DICTIONARY_VALUE])]){
        NSString *identifierStr = [self getIdentifierForVendor];
        NSMutableDictionary *usernamepasswordKVPairs = [NSMutableDictionary dictionary];
        [usernamepasswordKVPairs setObject:identifierStr forKey:KEY_GESTURELOCKERPLUGIN_TOKEN_DICTIONARY_VALUE];
        //save
        [self save:KEY_GESTURELOCKERPLUGIN_TOKEN_VALUE data:usernamepasswordKVPairs];

        return identifierStr;
    }else{
        return [readUserPwd objectForKey:KEY_GESTURELOCKERPLUGIN_TOKEN_DICTIONARY_VALUE];
    }
}


#pragma mark - 
-(void)save:(NSString *)service data:(id)data{
    //Get search dictionary
    NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
    //Delete old item before add new item
    SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
    //Add new object to search dictionary(Attention:the data format)
    [keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(__bridge id)kSecValueData];
    //Add item to keychain with the search dictionary
    SecItemAdd((__bridge CFDictionaryRef)keychainQuery, NULL);
}

-(NSMutableDictionary *)getKeychainQuery:(NSString *)service {
    return [NSMutableDictionary dictionaryWithObjectsAndKeys:
            (__bridge id)kSecClassGenericPassword,(__bridge id)kSecClass,
            service, (__bridge id)kSecAttrService,
            service, (__bridge id)kSecAttrAccount,
            (__bridge id)kSecAttrAccessibleAfterFirstUnlock,(__bridge id)kSecAttrAccessible,
            nil];
}

//取
-(id)load:(NSString *)service {
    id ret = nil;
    NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
    //Configure the search setting
    //Since in our simple case we are expecting only a single attribute to be returned (the password) we can set the attribute kSecReturnData to kCFBooleanTrue
    [keychainQuery setObject:(__bridge id)kCFBooleanTrue forKey:(__bridge id)kSecReturnData];
    [keychainQuery setObject:(__bridge id)kSecMatchLimitOne forKey:(__bridge id)kSecMatchLimit];
    CFDataRef keyData = NULL;
    if (SecItemCopyMatching((__bridge CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {
        @try {
            ret = [NSKeyedUnarchiver unarchiveObjectWithData:(__bridge NSData *)keyData];
        } @catch (NSException *e) {
            NSLog(@"Unarchive of %@ failed: %@", service, e);
        } @finally {
        }
    }
    if (keyData)
        CFRelease(keyData);
    return ret;
}


-(void)delete:(NSString *)service {
    NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
    SecItemDelete((__bridge CFDictionaryRef)keychainQuery);
}
@end
